if (document.images) {
	//main navigation	    
		    homeon = new Image(53,21);
	        homeon.src = "/common/images/nav/home_ro.gif";
	        homeoff = new Image(53,21);
	        homeoff.src = "/common/images/nav/home.gif";
			
			biographyon = new Image(74,21);
	        biographyon.src = "/common/images/nav/biography_ro.gif";
	        biographyoff = new Image(74,21);
	        biographyoff.src = "/common/images/nav/biography.gif";
			
			newson = new Image(46,21);
	        newson.src = "/common/images/nav/news_ro.gif";
	        newsoff = new Image(46,21);
	        newsoff.src = "/common/images/nav/news.gif";
			
			/*speecheson = new Image(74,21);
	        speecheson.src = "/common/images/nav/speeches_ro.gif";
	        speechesoff = new Image(74,21);
	        speechesoff.src = "/common/images/nav/speeches.gif";*/
			
			/*presentationson = new Image(97,21);
	        presentationson.src = "/common/images/nav/presentations_ro.gif";
	        presentationsoff = new Image(97,21);
	        presentationsoff.src = "/common/images/nav/presentations.gif";*/
			
			saveon = new Image(110,21);
	        saveon.src = "/common/images/nav/save_ro.gif";
	        saveoff = new Image(110,21);
	        saveoff.src = "/common/images/nav/save.gif";
		
			contacton = new Image(91,21);
	        contacton.src = "/common/images/nav/contact_ro.gif";
	        contactoff = new Image(91,21);
	        contactoff.src = "/common/images/nav/contact.gif";
			
			moreon = new Image(89,9);
	        moreon.src = "/common/images/cutlines/more_photos_ro.gif";
	        moreoff = new Image(89,9);
	        moreoff.src = "/common/images/cutlines/more_photos.gif";
			
			more2on = new Image(89,9);
	        more2on.src = "/common/images/cutlines/more_photos_ro.gif";
	        more2off = new Image(89,9);
	        more2off.src = "/common/images/cutlines/more_photos.gif";
					
			bookluanon = new Image(97,21);
	        bookluanon.src = "/common/images/nav/book-luan_ro.gif";
	        bookluanoff = new Image(97,21);
	        bookluanoff.src = "/common/images/nav/book-luan.gif";
			
			/*bookon = new Image(97,21);
	        bookon.src = "/common/images/frontpage/book-over.jpg";
	        bookoff = new Image(97,21);
	        bookoff.src = "/common/images/frontpage/book1.jpg";*/
			
			bookon = new Image(97,21);
	        bookon.src = "/common/images/frontpage/mcgill_text.jpg";
	        bookoff = new Image(97,21);
	        bookoff.src = "/common/images/frontpage/book1.jpg";
			
			paperon = new Image(89,9);
	        paperon.src = "/common/images/nav/paper-doll_ro.gif";
	        paperoff = new Image(89,9);
	        paperoff.src = "/common/images/nav/paper-doll.gif";
			
			productson = new Image;
	        productson.src = "/common/images/nav/products_ro.gif";
	        productsoff = new Image;
	        productsoff.src = "/common/images/nav/products.gif";
			
			linkson = new Image;
	        linkson.src = "/common/images/nav/links_ro.gif";
	        linksoff = new Image;
	        linksoff.src = "/common/images/nav/links.gif";
}

     function img_on(imgName) {
             if (document.images) {
             imgOn = eval(imgName + "on.src");
             document [imgName].src = imgOn;
             }
     }
     function img_off(imgName) {
             if (document.images) {
             imgOff = eval(imgName + "off.src");
             document [imgName].src = imgOff;
             }
     }